Chaeles h



(No Model.)

0. H. MILLER. MONKEY WRENCH.

, N0 291,213. Patented Jan. .1, I884.

N, PETERS. Hum-Lithogra her. Washingtom D. c.

UNI ED STATES PATENT OFFICE.

CHARLES H. MILLER, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE LOVELLMANUFACTURING COMPANY, (LIMITED,) OF SAME PLACE.

MONKEY-WRENCH.

SPECIFICATION forming part of Letters Patent No. 291,213, dated January1, 1884. Application filed-Tune 9, H83. (No model.)

To all whom it may concern/.-

Be it known that I, GHAnLEsH. MILLER, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Monkey-Wrenches; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to that class of wrenches in which one of thejaws is movable, so as to accomodate nuts of varying size, saidadjustment being effected by a thumb or worm nut, and are commonly knownas monkeywrenches, and it consists in providing a new and improvedconstruction of the same.

The object of the invention is to cheapen the construction by reducingthe amount of work to be expended on the construction to the lowestpossible point.

In the device here shown thewhole consists of three parts and a rivet.All the three parts are made of malleable cast-iron, and re- I quire nomorelabor to prepare them for usethan that incident to casting andmalleableizing, further than drilling the hole for the aforesaid rivet.The total cost of work to be expended on the castings after they areready for use will not exceed more than one-half cent; This will befully understood from the following general description.

The wrench is illustrated in the accompanying drawings as follows: w

Figurefl is a perspective view. Fig. 2 is a plan view of the back of thewrench. Fig. 3 is aside View, with the handle in section longitu'dinally.

A is the handle or body of the wrench, and carries as part of it thefixed jaw A.

B is the movable stem of the wrench, and carries as part of it themovable jaw B.

. On the back of the movable stem B are the notches b,with which theworm-wheel C gears or meshes. B, and the worm-wheel C are all formed bycasting. The body A is made hollow to receive the part B, and has on itsback ears or lugs aato receive the worm-wheel C and rivet 5o 0. The bodyis made open as much as possible to avoid undue weight, the tie a beingleft to prevent spreading and to hold the part B in place. I

As before stated, the only machine-work on the wrench is to drill thehole for the rivet c throughthe cars a a and the worm-wheel.

The wrench is put together by putting the part B in place in the body Aand putting the worm-wheel in place and riveting the end of the axis 0of the worm-wheel.

What I claim as new is- In a monkey-wrench, the combination,substantially as shown, of the following elements: a body or handle, A,having a longitudinal opening or cavity to receive the movable part, thefixed jaw A, and the worm-wheel supports a a, the movable partconsisting of a bar or stem, B, with worm-wheel notches or teeth b onits back, and the movable jaw B, and finally the worm-Wheel C, mountedbetween the supports or ears a a on the rivet a, and meshing with theteeth I) on the said movable part.

111 testimony whereof I aflix my signature in the presence of twowitnesses.

CHARLES H. MILLER.

-' Witnesses:

J NO. K. HALLOCK, Rom. H. PORTER.

The body A, the movable partB

